Infiniti QX4 (R50). Manual — part 160
13
ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-II
With CONSULT-II
1. Temporarily tighten sensor body fixing bolts as follows.
I
Gradually move the sensor body clockwise and stop it when “CLSD THL/P SW” signal switches from “OFF” to
“ON”, then temporarily tighten sensor body fixing bolts.
SEF954Y
2. Make sure two or three times that the signal is “ON” when the throttle valve is closed and “OFF” when it is opened.
3. Remove 0.05 mm (0.0020 in) feeler gauge then insert 0.15 mm (0.0059 in) feeler gauge.
4. Make sure two or three times that the signal remains “OFF” when the throttle valve is closed.
5. Tighten throttle position sensor.
6. Check the “CLSD THL/P SW” signal again.
The signal remains “OFF” while closing throttle valve.
OK or NG
OK
©
GO TO 14.
NG
©
GO TO 12.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-107
14
RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
With CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Confirm that proper vacuum is applied. Refer to Test No. 10.
2. Attach blind cap to vacuum port from which vacuum hose to throttle opener was disconnected.
3. Start engine.
4. Warm up engine to normal operating temperature.
5. Select “TP SW/TP SEN IDLE POSI ADJ” in “WORK SUPPORT” mode.
6. Stop engine. (Turn ignition switch “OFF”.)
7. Turn ignition switch “ON” and wait at least 5 seconds.
SEF864V
8. Turn ignition switch “OFF” and wait at least 10 seconds.
9. Repeat steps 7 and 8 until “CLSD THL POS” signal changes to “ON”.
SEF987Y
©
GO TO 19.
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-108
15
CHECK THROTTLE POSITION SWITCH CLOSED POSITION-II
1. Disconnect closed throttle position switch harness connector.
2. Check continuity between closed throttle position switch terminals 6 and 5 under the following conditions.
SEF330Z
I
Insert the 0.05 mm (0.0020 in) and 0.15 mm (0.0059 in) feeler gauge alternately between the stopper and throttle drum
as shown in the figure.
SEF953Y
“Continuity should exist” while inserting 0.05 mm (0.0020 in) feeler gauge.
“Continuity should not exist” while inserting 0.15 mm (0.0059 in) feeler gauge.
OK or NG
OK
©
GO TO 18.
NG
©
GO TO 16.
GI
MA
EM
LC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-109
16
ADJUSTMENT THROTTLE POSITION SWITCH CLOSED POSITION-I
1. Loosen throttle position sensor fixing bolts.
2. Confirm that proper vacuum is applied. Refer to Test No. 10. During adjustment, vacuum should be applied.
3. Insert 0.05 mm (0.0020 in) feeler gauge between stopper and throttle drum as shown in the figure.
SEF953Y
SEF330Z
4. Turn throttle position sensor body counterclockwise until continuity does not exist.
SEF954Y
©
GO TO 17.
TROUBLE DIAGNOSIS — BASIC INSPECTION
Basic Inspection (Cont’d)
EC-110
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